JFerg
Just got it firing!
I recently bought an 850T FB. This was imported from the USA to Australia about 9 years ago. I first saw it 6 or so years ago, when it showed 8,000 miles. Every indication is that this was genuine at the time. At the time it also had what appeared to be a Heath-Robinson arrangement of external springs to return the gear lever, a clear indication that the hairpin spring inside had broken.
Now mine, the bike shows 14,000 miles, and I am happy this is genuine. Prior to recommissioning it, in the process of sorting, I thought I'd fix the gearbox properly.
Once on the bench, there were two surprises. Firstly, the external return spring arrangement is far from Heath-Robinson; it's a bronze casting stamped "Patent Pending" and "31". Plainly it originally had two leaf springs, one for "up " and the other for "down", but the "up" spring had broken and been replaced roughly with a coil spring.
Inside the 'box there is no hairpin spring, broken or otherwise, and the eccentric spring tension adjusting screw was just a bolt filling the hole.
Pictures below, hopefully. Does anyone recognise this, or know exactly what it is?
Now mine, the bike shows 14,000 miles, and I am happy this is genuine. Prior to recommissioning it, in the process of sorting, I thought I'd fix the gearbox properly.
Once on the bench, there were two surprises. Firstly, the external return spring arrangement is far from Heath-Robinson; it's a bronze casting stamped "Patent Pending" and "31". Plainly it originally had two leaf springs, one for "up " and the other for "down", but the "up" spring had broken and been replaced roughly with a coil spring.
Inside the 'box there is no hairpin spring, broken or otherwise, and the eccentric spring tension adjusting screw was just a bolt filling the hole.
Pictures below, hopefully. Does anyone recognise this, or know exactly what it is?